package com.itany.servlet;

import org.apache.commons.io.IOUtils;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

/**
 * Author：汤小洋
 * Date：2022-11-11 11:23
 * Description：<描述>
 */
@WebServlet("/download")
public class DownloadServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String fileName = req.getParameter("fileName");

        FileInputStream is = new FileInputStream(req.getServletContext().getRealPath("WEB-INF/resource") + File.separator + fileName);

        ServletOutputStream os = resp.getOutputStream();

        IOUtils.copy(is, os);

        os.flush();
        os.close();
        is.close();
    }
}
